ALPHA DELTA-4B Antenna Switch
Best multi-port switch for radio enthusiasts needing reliable signal protection.
Elevate your radio setup with the Alpha Delta DELTA-4B Coax Switch, engineered for dependable performance across HF through UHF frequencies. This 4-port switch features a precision-machined shaft and quadrant mechanism for accurate, stable switching. It incorporates a low-loss micro-strip cavity design, positive detent switching, and a master antenna ground function for essential protection and isolation. Unselected antenna ports are automatically grounded, and a removable arc-plug surge protection module is included for added safety. Constructed with a durable powdercoated finish and brass components, this switch is proudly made in the USA.
$139.95
Owner Satisfaction
4.7
/ 5
Category Rank
1
/ 54
Best Antenna Accessories
Price vs Category Average
-19%
Below average
Antenna Switch Positions
4
/ -port
Who it's for
- High-power operators running demanding amateur radio setups
- Signal purists requiring clean isolation between antenna ports
- Field operators needing durable gear that withstands harsh environments
Who should skip it
- VHF and UHF enthusiasts requiring peak performance above 150 MHz
- Budget-conscious hobbyists looking for entry-level pricing
- Station managers seeking automated or remote-controlled switching convenience
Performance breakdown
Signal Integrity
Low-loss micro-strip cavity design ensures minimal signal degradation across all bands.
Build Durability
Rugged powdercoated finish and brass components offer long-term reliability in harsh environments.
Surge Protection
Removable arc-plug module provides a critical layer of defense against transients.
Port Isolation
Superior crosstalk suppression keeps your unselected antennas quiet and fully grounded.
Power Handling
Handles 1,500 watts with ease, supporting high-power setups without breaking a sweat.
Switching Precision
Positive detent mechanism provides satisfying, accurate feedback during every port selection.
Key Specs
Antenna Switch Positions
4-port
Antenna Switch Connector Type
UHF female, SO-239
Switch Impedance
50 ohms
Switch Insertion Loss
Less than 0.10 dB (to 30 MHz), less than 0.5 dB (through 450 MHz)
Switch Port Isolation (Crosstalk)
More than 50 dB
All Ports Grounded Position
Yes
Power Rating (0 to 30 MHz)
1,500W PEP/1,500 CW
Dimensions
5.250 x 3.500 x 1.250 in. (WHD)
Features
- Accurate and stable switching mechanism
- Low-loss signal path
- Reliable positive detent selection
- Master antenna grounding
- Grounded unselected ports for isolation
- Removable surge protection module
- Durable powdercoated finish
- Built in the USA
What customers say
The Alpha Delta 4B Antenna Switch earns deep trust for its exceptional reliability and rugged construction. Users consistently praise the heavy-duty metal enclosure, which assures longevity and excellent RF shielding, making it a dependable component. The core positive sentiment focuses on its impressive power handling, providing significant peace of mind for high power operators. A critical feature valued immensely is the dedicated grounding position, essential for safety and protection. While the design is classic, operators prioritize its functional excellence and low insertion loss over modern aesthetics. The consensus is that this switch delivers unparalleled durability and consistent performance, justifying the investment over its long service life.
Know before you buy
The DELTA-4B is rated for 1,500W PEP and 1,500W CW when operating between 0 and 30 MHz.
Yes, it includes a removable arc-plug surge protection module designed to help safeguard your equipment from static and voltage spikes.
For your safety and to minimize interference, the switch automatically grounds all unselected antenna ports when they are not in use.
Yes, the switch is engineered for use from HF through UHF frequencies. It maintains an insertion loss of less than 0.5 dB up to 450 MHz.
This unit is equipped with four standard SO-239 (UHF female) connectors, making it compatible with most common coaxial cable setups.
The switch uses a precision-machined shaft and a positive detent mechanism, which provides a tactile, secure click to ensure you know exactly when the connection is locked into place.
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